Ethyl 3-chloro-4-methyl-2-(trifluoromethoxy)pyridine-6-carboxylate
Methyl 4-cyano-3-hydroxy-2-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 3-chloro-2-methyl-6-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 4-cyano-6-hydroxy-3-(trifluoromethoxy)pyridine-2-carboxylate